COMMON CHEMICAL PROPERTY OF MATTER SCIENCE 4.pptx

COMMON CHEMICAL PROPERTY OF MATTER

1. COMMON CHEMICAL PROPERTY OF MATTER

2. 1. REACT WITH OTHER MATERIALS: CHEMICAL REACTION. Chemical Reaction Lighting the candle using a match or lighter is the start of a chemical reaction. Chemical properties refer to how a substance behaves in a chemical reaction. You cannot see these by just looking at a substance, like what you did with physical properties.

3. The starting materials in a chemical reaction are called reactants, while the result or the new materials formed are the products. The materials or products have to change their composition for you to be able to see the chemical properties .

4. 2. Flammability and Combustibility Flammability refers to how easily a substance or material ignites, while combustibility refers to how easily a substance or material burns. These properties can be exhibited by the burning matchstick that is flammable and combustible at the same time. This means that it ignites and burns easily.

5. 3. Biodegradability Biodegradability pertains to the ability of a material to decay or decompose with the aid of living organisms, specifically decomposers such as worms, fungi, and bacteria. This is another chemical property of matter. A substance that can undergo decay is called a biodegradable material. It is capable of breaking into smaller substances by the action of bacteria or microorganisms in the air. On the other hand, materials that cannot be broken down into smaller products by any chemical reaction are called non-biodegradable .

6. Non-biodegradable materials do not decay. They form waste materials that cannot be recycled or reused such as plastics, glass, and some toxic chemical waste. Some biodegradable materials also form waste but can be reused such as waste food and fruits, wood, vegetables, and the like.

7. The following are indications that materials are decaying: musty or foul odor from substances, presence of mold, undesirable change of colors and shapes, appearance of worms, and bubble formation. Sunlight that increases the temperature, water content, and soil with microorganisms or bacteria enhance the decay of biodegradable materials. Since temperature is one of the factors that contribute to the decay of materials, leftover food is kept in the refrigerator to avoid or delay spoilage or rotting. Microorganisms responsible for decaying do not grow fast in cold temperatures.

8. Minimizing Harmful Effects Brought About by Chemical Properties

9. Determine some of the beneficial and harmful effects brought about by chemical properties. Your home probably contains products and materials that are potentially dangerous. Do you know what to do if someone is poisoned?

10. Chemical Safety at Home: Storage Tips and Tricks: • Store harmful things in a special locked cabinet, so kids cannot touch them. Also, keep away flammable materials from heat. • When you use cleaning materials with chemicals, make sure to wash the cleaning cloths before using them again or before throwing them away. • Keep chemicals in the boxes or bottles they came in, so you car • Always check containers for damage or leaks, especially if yo keep chemicals for a long time.